—What’re the rules in class? —First, mobile phones can’t be ______.
#53189
A
to use
B
using
C
used
D
use
推荐题目
My parents often tell me __________ too much junk food because it’s bad for my health.
#52441
A
not eating
B
not to eat
C
eating
D
to eat
Finally, save your document before you ________ your computer.
#63661
A
turn on
B
turn up
C
turn off
D
turn down